I have a Go Pro, one of the less expensive models, with no external audio input, and I absolutely love the quality of the video. The big thing with the Go Pro is you will never be out of focus because of the super wide angle lens. You can go from close up to infinity and still be in focus - neat feature. Of course, that wide angle lens also allows you so be relatively close to the keyboard with the camera and still have the entire keyboard in the fram and in perfect focus. I paid about $149 for my Go Pro Hero on Amazon and purchased an accessory kit from another online site for under $20 that included a great carry case, headband, chest band, selfie stick, suction cup mount and a couple stick on mounts. All of it looks and works just as good as the high priced kits you purchase from Go Pro.

Have fun,

Gary